...裂纹扩展力;;脆性断裂准则;;柔度公式;;位移公式;;裂纹扩展的稳定性 [gap=804]Keywords: Internal variable thermodynamics, Linear-elastic fracture mechanics, Crack extension force, Criteria of brittle fracture, Compliance equation, Displacement equation, Stab...
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由此求得动态裂纹扩展时，沿裂纹边界的能量释放量和能量释放率(动态裂纹扩展力)。
Based on the boundary variational theorem, the energy release quantity and energy release rate (dynamical crack extension force) along the crack boundary are obtained.
在混凝土类软化材料断裂研究中，裂纹端部损伤区被简化为具有黏聚应力分布的非线性裂纹，该黏聚力对裂纹扩展有阻抗作用。
In the fracture study of softening materials, the damage area of crack tip is regarded as a piece of nonlinear crack with cohesive force.
研究结果表明：切削花岗岩时，受切削力及其冲击的作用，PDC刀具产生近乎平行岩石表面的磨损形式，磨损机理为机械作用引起聚晶金刚石层微观裂纹产生并扩展而导致的金刚石颗粒的微观破碎。
The study shows that in granite cutting processes, PDC cutter is worn by micro chipping in diamond grains due to mechanical action, and the wear surface is almost parallel to the rock surface.
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